#mian{
    position: relative;
    background-color: whitesmoke;
    border: 3px solid #dddddd;
    width: 1200px;
    height: 1000px;
    margin: 10px auto;
    margin-bottom: -100px;
}

#title{
    margin: 0 auto;
    text-align: center;
}
.content{
    background-color: white;
    border: 10px solid gainsboro;
    box-shadow: 5px 5px 10px black;
    width: 90%;
    height: 90%;
    margin:0 auto;
    position: relative;
    top:-5px;
}
#limit{
    /*background-color: #e8e8e8;*/
    position: relative;
    top: 60px;
    width: 300px;
    margin: 0 auto;
}
.a2{
    margin-left: -6px;
    text-decoration: none;
    list-style-type: none;
    color: black;
    position: relative;
    border: 1px solid black;
    top: -10px;
    border-radius: 3px;
    display: inline-block;
    text-align: center;
    width: 50px;
    height: 30px;
    padding-top: 10px;
}
.a2:visited{
    color: black;
}
.a2:link{
    color: black;
}
.a2:hover{
    color: darkorange;
}
.d1{
    position: relative;
    top: 30px;
    background-color: white;
    border: 1px solid #e8e8e8;
    width: 90%;
    height: 200px;
    margin: 0 auto;
}
.d1 ul{
    list-style-type: none;
}
.d1 ul li{
    /*position: absolute;*/
    margin-left: 10px;
    position: absolute;
}
.sp1{
    background-image: url("https://assets.nightcherry.com/cms/upload/300075/5f315ed925ae4.png");
    background-size:150%;
    background-position:-25px 2px;
    background-repeat: no-repeat;
    display:block;
    width: 150px;
    height: 160px;
    /*height: inherit;*/
    position: relative;
    background-color: black;
}
.sp2{
    background-image: url("https://assets.nightcherry.com/cms/upload/300075/5f315ed925ae4.png");
    background-size:150%;
    background-position:-25px 2px;
    background-repeat: no-repeat;
    display:block;
    width: 150px;
    height: 160px;
    /*height: inherit;*/
    position: relative;
    background-color: black;
    left: 180px;
}
.sp3{
    background-image: url("https://assets.nightcherry.com/cms/upload/300075/5f315ed925ae4.png");
    background-size:150%;
    background-position:-25px 2px;
    background-repeat: no-repeat;
    display:block;
    width: 150px;
    height: 160px;
    /*height: inherit;*/
    position: relative;
    background-color: black;
    left: 360px;
}
.sp4{
    background-image: url("https://assets.nightcherry.com/cms/upload/300075/5f315ed925ae4.png");
    background-size:150%;
    background-position:-25px 2px;
    background-repeat: no-repeat;
    display:block;
    width: 150px;
    height: 160px;
    /*height: inherit;*/
    position: relative;
    background-color: black;
    left: 540px;
}
.sp5{
    background-image: url("https://assets.nightcherry.com/cms/upload/300075/5f315ed925ae4.png");
    background-size:150%;
    background-position:-25px 2px;
    background-repeat: no-repeat;
    display:block;
    width: 150px;
    height: 160px;
    /*height: inherit;*/
    position: relative;
    background-color: black;
    left: 720px;
}